According to this story, Congressman Alan Grayson, who represents much of Orlando, Florida, doesn’t believe that Ted Cruz meets the constitutional qualifications to be President. Grayson, a Democrat, says if the Republican Party nominates Ted Cruz, that litigation will result.
The Harvard Crimson, probably the most famous student newspaper in the United States, has this article about Jill Stein. Stein graduated from Harvard.
This article by California political scientist John J. Pitney says it is plausible the only two candidates on the November 2016 ballot for U.S. Senate in California will be Kamala Harris and Loretta Sanchez, both liberal Democrats.
The Arizona state government has told the U.S. Supreme Court that it won’t file a response in Arizona Libertarian Party v Bennett, 15-598. This is the case in which the Libertarian and Green Parties are fighting the law that says only the two largest parties should have their own checkbox on the voter registration form. The Libertarian and Green Parties are also on the Arizona ballot and they nominate by primary, just as the Democratic and Republican Parties do.
The Arizona law is especially harmful to the Green Party, because it never has enough registered members to remain ballot-qualified. Chances are, if the Arizona form mentioned the Green Party as a registration choice, after a few years Green registration would rise high enough so that it would remain on the ballot.
If the Supreme Court asks Arizona to respond, then Arizona will respond. The Court hasn’t yet set a conference date for this case.
The Limestone County Republican Party (in Alabama) has denied primary ballot access to a candidate for District Attorney, on the grounds that the party doesn’t think she is sincere when she says she is a Republican. See this story.